*{
    margin: 0;
    padding: 0;
}
li{
    list-style: none;
}
a{
    text-decoration: none;
}
h1, h2, h3, h4, h5, h6, p {
    margin: 0;
    padding: 0;
    font-weight: normal;
}
body{
    width: 100%;
    position: relative;
}
header{
    width: 100%;
    position: fixed;
    top: 0px;
    left: 0px;
    z-index: 100;
    background: white;
    
}
.logo{
    text-align: center;
    width: 100%;
    height: 100px;
    line-height: 100px;
}
.list{
    display: flex;
    width: 700px;
    height: 40px;
    justify-content: space-around;
    background-color:#B71A30;
    margin: 0 auto;
   
}
.list li{
    margin-right: 20px;
    flex: 1;
    text-align: center;
    color: #fff;
    line-height: 40px;
}
.list>li:hover{
    background-color: #fff;
    border-bottom: 2px solid red;
    color: red;
 }
 .top{
     width: 100%;
     height: 40px;
     background-color: #B71A30;
     position: absolute;

 }
 .list1{
    position: absolute;
    list-style: none;
    width: 250px;
    height: 40px;
    background-color: #B71A30;
    right: 0;
    top: 0;
    line-height: 40px;
    font-weight: 600;

}
.list1 li {
    margin-right: 20px;
    float: left;
    text-align: center;
    color: #fff;
    line-height: 40px;
}
.banner{
    width: 100%;
    height: 928px;
    background-color: blueviolet;
}
.banner img{
    vertical-align: middle;
    border: 0px;
    left: 0;
    z-index: 10;
    width: 100%;
    transition: 2s;
    transform: translate(0, 0);
    position: relative;
    
}
/* .product-container{ */
    /* width: 1500px; */
    /* height: 1000px; */
    /* padding-top: 77px; */
    /* margin: 0 auto; */
    /* background-color: aquamarine; */
    /* padding: 0; */
/* } */
/* .product-cate{
    float: left;
    width: 280px;
    height: 520px;
    padding: 0;
    margin-right: 55px;
    position: relative;
    background-color: blueviolet;
} */
/* @import "./reset"; */
 /* 设置楼梯的高度 */
.section{
      height: 900px;
      width: 100%;
      text-align: center;
      font-size: 50px;
      color: #fff;
      line-height: 900px;
}
.section img{
    width: 375px;
    height: 375px;
    /* display: block; */
}

.stairs-btn{
      width: 100px;
      height: 240px;
      position: fixed;
      right: 5%;
      top: 50%;
      margin-top: -120px;
      display: none;

      
}
.stairs-btn li{
            height: 39px;
            border-bottom: 1px solid #000;
            text-align: center;
            line-height: 39px;
            transition: all .5s;
            cursor: pointer;

            color: #fff;
            background-color: rgba( 0 , 0 , 0 , .6 );

           
      } 
.stairs-btn li .active{
                  background-color: rgba( 0 , 0 , 0 , .4 );
                  color: hotpink;  
                  font-weight: bold;
            }
            
.stairs-btn li:hover{
                  background-color: rgba( 0 , 0 , 0 , .3 );
                  color: #ddd;
            }